Diapir

A diapir ( from Ancient Greek διαπείρειν diapeirein " penetrate " ) is in the geology of an area that has risen in the material from deeper layers. This phenomenon is called diapirs. It comes in a large scale before the mantle. About hotspots form Manteldiapire (german mantle plumes ). The impetus for the rise is a lower density of the lower layer. The ensuing Rayleigh - Taylor instability can ascend bubbles of the material lying below.

Ascending melts can form intrusions, such as the granitic Batholithe, large mushroom-shaped plutonic rock body, also called plutons.

Evaporitdiapire can form salt domes and salt walls. Salt domes are conical, cylindrical or mushroom-shaped. They protrude from the layer from which they originated (mother salt layer, Eng. Motherfucking salt layer) up, in some cases up to the surface.

• Geodynamics
• Plutonism
• Tectonics